Steel slag stress absorption layer material and preparation method thereof

A stress-absorbing layer and steel slag technology is applied in the field of asphalt pavement material preparation, which can solve the problems of limited resource reserves, weakening the strength and stiffness of the roadbed, and affecting the performance of the pavement, and achieves a simple preparation method process, excellent fatigue crack resistance, and stress The ability to enhance the effect of

Inactive Publication Date: 2021-03-02
内蒙古综合交通科学研究院有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existence of reflective cracks, on the one hand, will destroy the integrity and continuity of the pavement, affecting the use quality of the pavement and the appearance of the road surface; Entering the base and roadbed greatly weakens the strength and stiffness of the roadbed and seriously affects the performance of the road surface
[0004] In addition, with the rapid development of road and urban road construction in our country, the demand for road materials is increasing year by year, and the demand for natural aggregates such as basalt is huge every year, but the existing resource reserves are limited, and many areas have banned mining due to environmental protection policies.

Method used

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  • Steel slag stress absorption layer material and preparation method thereof
  • Steel slag stress absorption layer material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] The preparation of the steel slag stress absorbing layer material comprises the following steps:

[0041] Step 1, weighing 7 parts of mineral powder, 100 parts of steel slag aggregate, 9 parts of SBS modified pitch and 0.2 part of brucite mineral fiber by weight;

[0042] Step 2, heating the aggregate and mineral powder at a constant temperature of 170-180°C for 5 hours, and set aside;

[0043] Step 3, heating the SBS modified asphalt to 170-180°C, fully stirring evenly, and setting aside;

[0044] Step 4, dry mix the steel slag aggregate heated at constant temperature for 30 seconds, then add brucite mineral fiber, dry mix for 10 seconds, then add heated SBS modified asphalt, wet mix for 90 seconds, and finally add mineral powder and mix for 20 seconds.

Embodiment 2

[0046] The preparation of the steel slag stress absorbing layer material comprises the following steps:

[0047] Step 1, taking by weight 14 parts of mineral powder, 200 parts of steel slag aggregate, 19 parts of SBS modified pitch and 0.4 part of brucite mineral fiber;

[0048] Step 2, heating the aggregate and mineral powder at a constant temperature of 170-180°C for 5 hours, and set aside;

[0049] Step 3, heating the SBS modified asphalt to 170-180°C, fully stirring evenly, and setting aside;

[0050] Step 4, dry mix the steel slag aggregate heated at constant temperature for 30 seconds, then add brucite mineral fiber, dry mix for 10 seconds, then add heated SBS modified asphalt, wet mix for 90 seconds, and finally add mineral powder and mix for 20 seconds.

Embodiment 3

[0052] The preparation of the steel slag stress absorbing layer material comprises the following steps:

[0053] Step 1, weighing 7 parts of mineral powder, 100 parts of steel slag aggregate, 9 parts of SBS modified pitch and 0.3 part of brucite mineral fiber by weight;

[0054] Step 2, heating the aggregate and mineral powder at a constant temperature of 170-180°C for 5 hours, and set aside;

[0055] Step 3, heating the SBS modified asphalt to 170-180°C, fully stirring evenly, and setting aside;

[0056] Step 4, dry mix the steel slag aggregate heated at constant temperature for 30 seconds, then add brucite mineral fiber, dry mix for 10 seconds, then add heated SBS modified asphalt, wet mix for 90 seconds, and finally add mineral powder and mix for 20 seconds.

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Abstract

The invention discloses a steel slag stress absorption layer material and a preparation method thereof. The method comprises the following steps of: (1) respectively weighing 7-14 parts by weight of mineral powder, 100-200 parts by weight of steel slag aggregate, 9-19 parts by weight of SBS modified asphalt and 0-0.4 parts by weight of brucite mineral fibers; (2) heating the aggregate and the mineral powder at a constant temperature of 170-180 DEG C for more than 4 hours for later use; (3) heating the SBS modified asphalt to 170-180 DEG C, and fully and uniformly stirring for later use; and (4) carrying out dry mixing on the steel slag aggregate subjected to constant-temperature heating for 25-35 seconds, then adding brucite mineral fibers, carrying out dry mixing for 8-12 seconds, then adding the heated SBS modified asphalt, carrying out wet mixing for 85-95 seconds, and finally adding mineral powder, and carrying out mixing for 15-25 seconds. The stress absorption layer material manufactured by the method is high in viscoelasticity and good in fatigue cracking resistance. The preparation method is simple in process, economical and environment-friendly, and has important practicalsignificance and economic value.

Description

technical field [0001] The invention relates to the field of asphalt pavement material preparation, in particular to a steel slag stress absorbing layer material and a preparation method thereof, which are used between cement concrete pavement and asphalt overlay. Background technique [0002] Regardless of the new asphalt pavement or the asphalt pavement on the old road, under the interaction of temperature and traffic load, the micro-cracks will continue to expand, and stress concentration will easily occur at the bottom of the asphalt pavement, and the cracks will expand to the asphalt pavement, thus forming reflection cracks. [0003] The existence of reflective cracks, on the one hand, will destroy the integrity and continuity of the pavement, affecting the use quality of the pavement and the appearance of the road surface; Entering the base and roadbed greatly weakens the strength and stiffness of the roadbed and seriously affects the performance of the road surface. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B18/141C04B18/142C04B14/46
Inventor 马万斌张广白志平乔志牛昌昌王迎丹杨雅玲梁鑫宝群群姚嘉郭慧峰张岩吴少鹏谢君庞凌陈美祝刘全涛杨东
Owner 内蒙古综合交通科学研究院有限责任公司
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